CN104698148B - Oil gas safety monitoring control method in a kind of restricted clearance - Google Patents
Oil gas safety monitoring control method in a kind of restricted clearance Download PDFInfo
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- CN104698148B CN104698148B CN201510078317.1A CN201510078317A CN104698148B CN 104698148 B CN104698148 B CN 104698148B CN 201510078317 A CN201510078317 A CN 201510078317A CN 104698148 B CN104698148 B CN 104698148B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000012544 monitoring process Methods 0.000 title claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 113
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000001301 oxygen Substances 0.000 claims abstract description 37
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 37
- 230000007123 defense Effects 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000004880 explosion Methods 0.000 claims description 9
- 238000004868 gas analysis Methods 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 abstract description 2
- 229910052756 noble gas Inorganic materials 0.000 description 8
- 238000007789 sealing Methods 0.000 description 6
- 238000005070 sampling Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000000835 electrochemical detection Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- -1 hydro carbons Hydrocarbon Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000013102 re-test Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Abstract
The invention belongs to technical field of fire control, and specifically disclose oil gas monitoring and control method in a kind of restricted clearance, it is by the gas concentration in the mixed gas in detection restricted clearance and oxygen concentration, and the relation finally according to gas concentration and oxygen concentration carries out security management and control.The present invention starts with from fuel and two key elements of oxygen, sets up oil gas and Oxygen control model, it is determined that fire-proof and explosion-proof oil gas and oxygen concentration critical parameters, by the oil gas in Control constraints space and oxygen concentration thus realize the active defense in restricted clearance.
Description
Technical field
The invention belongs to technical field of fire control, particularly to oil gas safety monitoring control method in a kind of restricted clearance.
Background technology
The oil gas accident caused due to the inflammable and explosive property of oil plant constantly occurs, and research oil gas security protection is significant.Theory of Combustion is thought: oxygen, combustible and enough ignition energies are as the three elements of burning, and three is indispensable.The hydro carbons Hydrocarbon such as the primary condition of oil gas explosion is necessarily present oil gas and oxygen, and oil gas refers to the gas that generates from oil plant volatilization or effusion, the mainly C1-C6 of gaseous state, concrete component and oil variety, ambient temperature are relevant.When in oil tank, oil gas and air or oxygen run into burning things which may cause a fire disaster and occur the concentration range exploded to be referred to as the explosion ratio limit when uniformly mix in the range of finite concentration, referred to as explosion limit, including LEL (LEL) and UEL, explosion limit is affected by critical oxygen content, i.e. the marginal value of oxygen concentration required for the mixed gas of explosive range edge generation blast.
Active safety guard technology is primarily directed to oxygen and combustible carries out detection and analyzes, judges safely and active defense.At present, domestic standard, specification do not carry out Uniform provisions to safe decision rule, it is impossible to support the application of active defense technology.
Chinese patent CN201210413394.4 discloses a kind of oil gas explosion critical parameters and analyzes method, utilize the related data tested out under oil gas explosion critical state, set up early warning curve, safety curve respectively and stop curve, distribution by three controlling curve, by the oil gas volumetric concentration currently surveyed and carrier of oxygen volume concentrations and the position relationship of three controlling curve, it is possible to know the state that current system is in accurately.And oil gas volumetric concentration value is closely related with component of mixture in the critical parameters that explode, therefore the method can only change for the gas mixture of fixing component, such as fruit component, needs retest blast critical parameters and be analyzed, lacks versatility.
Summary of the invention
It is an object of the invention to: for the problem of above-mentioned existence, it is provided that a kind of monitoring result according to the gas concentration in mixed gas in restricted clearance and oxygen concentration sets up the method that security control model carries out active defense control.
The technical solution used in the present invention is such that oil gas safety monitoring control method in a kind of restricted clearance, particularly as follows: first, by oil gas explosion least concentration (LEL) and the carrier of oxygen volume concentrations (VOL) of the mixed gas in gas analysis arrangement detection restricted clearance, then set up security control model, it is characterised in that:
When, in described mixed gas, during oxygen concentration≤8%VOL, no matter gas concentration is how many, the mixed gas in described restricted clearance is in the safe condition not firing state；
When, in described mixed gas, during gas concentration≤10%LEL, no matter oxygen concentration is how many, the mixed gas in described restricted clearance is in the safe condition not firing state；
When, in described mixed gas, oxygen concentration ＞ 8%VOL, when gas concentration ＞ 10%LEL and≤25%LEL, the mixed gas in described restricted clearance is in one-level alert status；
When, in described mixed gas, oxygen concentration ＞ 8%VOL, when gas concentration ＞ 25%LEL and≤50%LEL, the mixed gas in described restricted clearance is in two grades of alert status；
When, in described mixed gas, when oxygen concentration ＞ 8%VOL and gas concentration ＞ 50%LEL, the mixed gas in described restricted clearance is in three grades of alert status.
Oil gas safety monitoring control method in a kind of restricted clearance of the present invention, controls inerting equipment according to security control model and automatically restricted clearance is carried out active defense, it is characterised in that:
When the mixed gas in described restricted clearance is in three grades of alert status, sends three grades of alarm signals force start inerting equipment, the mixed gas in restricted clearance is carried out inerting protection；
When the mixed gas in described restricted clearance is in two grades of alert status, send two grades of early warning signals, if inerting equipment has been turned on, then continue to remain on state；
When the mixed gas in described restricted clearance is in one-level alert status, send one-level early warning signal, if inerting equipment has been turned on, then continue to remain on state；
When the mixed gas in described restricted clearance is in safety work state, do not send signal, if inerting equipment has been turned on, the most out of service.
The present invention starts with from fuel and two key elements of oxygen, sets up oil gas and Oxygen control model, it is determined that fire-proof and explosion-proof oil gas and oxygen concentration critical parameters, by the oil gas in Control constraints space and oxygen concentration thus realize the active defense in restricted clearance.
Detailed description of the invention
The present invention is described in detail below.
In order to make the purpose of the present invention, technical scheme and advantage clearer, below the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Oil gas safety monitoring control method in a kind of restricted clearance, described restricted clearance is as a example by first and second sealing space of large-scale petroleum storing tank, in first and second sealing space of described petroleum storage tank, gas tip and sampler are set, in tank field, fire wall is outside equipped with preventer, preventer is rustless steel box-shaped building construction, overall skid-mounted.Sampling pump, pretreatment module, gas analyzer for O2, analysis of combustible gases instrument, exhaust processor, noble gas control assembly are installed in device, demarcate assembly, electric control gear and security monitoring assembly.Gas tip controls assembly by noble gas pipe network and preventer noble gas and connects, and sampler is connected with preventer sampling pump by sampling pipe network, and external noble gas source controls assembly by pipe network and preventer noble gas and connects.Wherein, the installation site of sampler is in the middle part of first and second sealing, improves the precision of gas analysis；The jet of noble gas shower nozzle is all uniformly distributed installation towards sealing ring tangent to periphery direction, the same side, forms circulation of air flow, thus shorten the inerting deadline in making sealing space；It addition, gas analyser is arranged in the preventer outside fire wall, work in the environment of constant temperature and humidity, demarcate and safeguard the most convenient, the reliability of gas analyser and detection data accuracy obtained abundant guarantee.
Its concrete oil gas safety monitoring control method is: first, and system start-up automatic protection program, under the instruction of electric control gear, sampling pump, gas analyser and sample gas pretreatment unit are in real-time running state；Sampling equipment switches the mixed gas extracted successively at each sample point in storage tank seal space by electromagnetic valve, then, the preprocessed device of sample gas carries out filtering, taking off entrance gas analysis arrangement after liquid, current limliting process, in gas analysis arrangement, Electrochemical Detection module carries out oxygen concentration analysis to from the sample gas sealing spatial decimation, infrared optics detection module carries out gas concentration analysis to sample gas, and detection data export after treatment to electric control gear.
When in described mixed gas; when oxygen concentration ＞ 8%VOL and gas concentration ＞ 50%LEL; mixed gas in described restricted clearance is in three grades of alert status; system sends three grades of alarm signals; inerting equipment force start, carries out inerting protection to the mixed gas in restricted clearance.
When in described mixed gas; oxygen concentration ＞ 8%VOL; when gas concentration ＞ 25%LEL and≤50%LEL; mixed gas in described restricted clearance is in two grades of alert status; system sends two grades of early warning signals, and inerting equipment keeps the inerting protection of mixed gas in restricted clearance.
When in described mixed gas; oxygen concentration ＞ 8%VOL; when gas concentration ＞ 10%LEL and≤25%LEL; mixed gas in described restricted clearance is in one-level alert status; system sends one-level early warning signal, and inerting equipment keeps the inerting protection of mixed gas in restricted clearance.
When in described mixed gas, during oxygen concentration≤8%VOL, no matter gas concentration is how many, the mixed gas in described restricted clearance is in the state that do not fires, and inerting equipment stops the mixed gas in restricted clearance is carried out inerting protection.
When in described mixed gas, during gas concentration≤10%LEL, no matter oxygen concentration is how many, the mixed gas in described restricted clearance is in the state that do not fires, and inerting equipment stops the mixed gas in restricted clearance is carried out inerting protection.
Wherein, LEL represents oil gas explosion least concentration, and VOL represents carrier of oxygen volume concentrations.
Under the operating mode not receiving Lightning Warning, when the result of determination of any one sample point is dangerous operation, system injects noble gas from trend whole tank sealed ring annular space, until result of determination is for just terminating after safety to note nitrogen, it is ensured that the gas concentration in tank sealed ring is not higher than 50%LEL；Under the operating mode receiving Lightning Warning signal, when result of determination is two grades of early warning, system i.e. injects noble gas from trend tank sealed ring, it is ensured that the gas concentration in tank sealed ring is not higher than 25%LEL.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, should be included within the scope of the present invention.
Claims (2)
1. oil gas safety monitoring control method in a restricted clearance, particularly as follows: first, by the oil gas explosion least concentration LEL in mixed gas in gas analysis arrangement detection restricted clearance and carrier of oxygen volume concentrations VOL, then, security control model is set up according to testing result, it is characterised in that:
When, in described mixed gas, during oxygen concentration≤8%VOL, no matter gas concentration is how many, the mixed gas in described restricted clearance is in the safe condition not firing state；
When, in described mixed gas, during gas concentration≤10%LEL, no matter oxygen concentration is how many, the mixed gas in described restricted clearance is in the safe condition not firing state；
When, in described mixed gas, oxygen concentration ＞ 8%VOL, when gas concentration ＞ 10%LEL and≤25%LEL, the mixed gas in described restricted clearance is in one-level alert status；
When, in described mixed gas, oxygen concentration ＞ 8%VOL, when gas concentration ＞ 25%LEL and≤50%LEL, the mixed gas in described restricted clearance is in two grades of alert status；
When, in described mixed gas, when oxygen concentration ＞ 8%VOL and gas concentration ＞ 50%LEL, the mixed gas in described restricted clearance is in three grades of alert status.
Oil gas safety monitoring control method in restricted clearance the most according to claim 1, it is characterised in that:
Inerting equipment carries out active defense under the control of security control model automatically; when the mixed gas in described restricted clearance is in three grades of alert status; send three grades of alarm signals force start inerting equipment, the mixed gas in restricted clearance is carried out inerting protection；
When the mixed gas in described restricted clearance is in two grades of alert status, send two grades of early warning signals, if inerting equipment has been turned on, then continue to remain on state；
When the mixed gas in described restricted clearance is in one-level alert status, send one-level early warning signal, if inerting equipment has been turned on, then continue to remain on state；
When the mixed gas in described restricted clearance is in safety work state, do not send signal, if inerting equipment has been turned on, the most out of service.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510078317.1A CN104698148B (en) | 2015-02-13 | 2015-02-13 | Oil gas safety monitoring control method in a kind of restricted clearance |
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| CN201510078317.1A CN104698148B (en) | 2015-02-13 | 2015-02-13 | Oil gas safety monitoring control method in a kind of restricted clearance |
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| CN104698148B true CN104698148B (en) | 2016-08-17 |
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| CN107219309A (en) * | 2016-03-22 | 2017-09-29 | 国家安全生产监督管理总局化学品登记中心 | Expandable polystyrene risk assessment method |
| CN106185096A (en) * | 2016-08-26 | 2016-12-07 | 武汉安得环境工程有限公司 | Inner floating roof light-end products tank optical-fiber laser oxygen concentration on-line monitoring early warning system |
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| CN102901804B (en) * | 2012-10-25 | 2014-10-29 | 四川威特龙消防设备有限公司 | Oil-gas explosion critical parameter analysis method |
| CN103760306B (en) * | 2014-01-15 | 2016-01-20 | 中国人民解放军后勤工程学院 | The early warning that a kind of restricted clearance oil gas thermal explosion occurs and control method |
| CN104090089B (en) * | 2014-07-03 | 2016-06-29 | 中国人民解放军后勤工程学院 | A kind of cavern oil depot oil gas dangerous matter sources grading forewarning system method |
| CN104103155B (en) * | 2014-07-03 | 2016-08-24 | 中国人民解放军后勤工程学院 | A kind of oil gas dangerous matter sources grading forewarning system system |
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Application publication date: 20150610 Assignee: BEIJING ZHONGYOU AISUO ENERGY SAVING AND ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Assignor: VITALONG FIRE SAFETY GROUP Co.,Ltd. Contract record no.: 2019510000021 Denomination of invention: Oil and gas security monitoring control method in restricted space Granted publication date: 20160817 License type: Common License Record date: 20190710 |
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Denomination of invention: Oil and gas safety monitoring and control method in confined space Effective date of registration: 20211223 Granted publication date: 20160817 Pledgee: Bank of Sichuan Co.,Ltd. Pledgor: VITALONG FIRE SAFETY GROUP Co.,Ltd. Registration number: Y2021980016177 |
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Date of cancellation: 20230306 Granted publication date: 20160817 Pledgee: Bank of Sichuan Co.,Ltd. Pledgor: VITALONG FIRE SAFETY GROUP Co.,Ltd. Registration number: Y2021980016177 |
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Denomination of invention: A Method for Monitoring and Controlling Oil and Gas Safety in Confined Space Effective date of registration: 20230313 Granted publication date: 20160817 Pledgee: Bank of Sichuan Co.,Ltd. Pledgor: VITALONG FIRE SAFETY GROUP Co.,Ltd. Registration number: Y2023510000064 |
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Granted publication date: 20160817 Pledgee: Bank of Sichuan Co.,Ltd. Pledgor: VITALONG FIRE SAFETY GROUP Co.,Ltd. Registration number: Y2023510000064 |
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Denomination of invention: A method for monitoring and controlling oil and gas safety in confined spaces Granted publication date: 20160817 Pledgee: Bank of Sichuan Co.,Ltd. Pledgor: VITALONG FIRE SAFETY GROUP Co.,Ltd. Registration number: Y2024510000042 |